Obtained: Speak with the Kooky Cook near Yamcha’s Hideout in the Southeast Mountains Area during the post game as Gohan. You will need to have completed the sub story Frequently Attacked Villager.
Objective: Defeat the enemies
Travel to Yamcha’s Hideout in the Southeast Mountains Area to find Kooky Cook nearby on a bridge being attacked by monsters. Interact with her to intervene and defeat them to complete the story.